Magnetic drag vessel slowing method and apparatus

ABSTRACT

The present invention of MagDrag relates to methods and apparatus of a magnetic hull attaching sea anchors to slow down and impair the forward motion of sea vessels. The basic MagDrag device includes four major components, a large magnet, a pump, a sea anchor bag and a buoy.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims priority to U.S. patent application Ser. No.13/950,126, filed Jul. 24, 2013, entitled “MAGNETIC DRAG VESSEL SLOWINGMETHOD AND APPARATUS” as a continuation application. The U.S. patentapplication Ser. No. 13/950,126, in turn claims priority to U.S.Provisional Patent Application Ser. No. 61/675,326 filed, Jul. 24, 2012and entitled, “MagDrag Vessel Slowing Buoys”. The contents of each arerelied upon and hereby incorporated by reference.

BACKGROUND

The history of the sea based transport from harbors and across the highseas includes passive methods and apparatuses intended to stop ships orat least impede the rapid proceeding of a ship under way.

Examples of methods for impeding passage of a ship underway includebuoyant and semi-buoyant mines that have been used to blow holes inships and sink them. In other examples, nets, chains and ropes have beenemployed at harbor entrances or restricted waterway to stop and ensnarepropellers and rudders of sea going vessels. Still other examplesinclude ensnaring cables around a ship propeller to impede the propellerfrom turning from operating at full speed and perhaps stalling theengines all together.

Some known technologies such as U.S. Pat. No. 8,245,617 (the '617Patent) described methods of deploying immobilization devices that usesticky tendrils to ensnare land or water borne vehicles. The '617 Patentwas based upon an entangling device including a drag chute that isdragged by a vessel and illustrates the entangling device beingentangled on the propeller. The principle method of attachment describedby the '617 Patent is based on “entanglement”.

In addition, the method described in 617 assumed the “immobilization”would come from the “entangling apparatus” which is intended to “foul orrender a large prop”. The apparatus included a “drag chute” connected toa “strap” which implies the tension or drag from the “drag chute” is notthe principal modality of slowing the vessel. A “strap” is generallyknown to be made of cloth or flexible material and not generally knownto be strong nor as the principle method by which the vessel is slowed.

The methods listed above, tend to be destructive to the ships involvedand also expensive both in the deployment of the apparatus and thedamage to the ship and perhaps harm to a crew on a ship impacted by suchdevices.

The need therefore remains for apparatus and methods to enablelarge-scale and low-cost deployment of non-lethal ship-slowingtechnology to impede normal passage of a ship underway.

SUMMARY OF THE INVENTION

Accordingly, the present invention provides methods and apparatus forimpeding the passage of a ship underway. The present invention includesan apparatus and a method by which a drag device attaches to the hull ofa ship via a ship attachment mechanism, such as for example a powerfulmagnet. The ship attachment mechanism in turn is connected to a dragdevice that slows the movement of ship underway. One example of a dragdevice includes a self inflating sea anchor. A self inflating sea anchormay be deployed, for example via a similar mechanism as an airbag isdeployed in a motor vehicle.

A basic magnetic attachment and drag impediment device “MagDrag device”may include three major components, a large magnet, a sea anchor bag anda buoy. The buoy provides floatation for heavier than water componentsincluding the attachment magnet and sea anchor bag.

In some embodiments, as a seagoing vessel passes over and impacts aMagDrag apparatus, the float will drag along or under the hull as theseagoing vessel moves by, turbulence, the magnetic plate will tumble andeventually come close to and attach tightly to the hull and then the seaanchor will inflate due to the forward motion of the seagoing vessel. Atthat time the buoy's attachment ring which is loosely attached to themagnet and sea anchor will tear away and float to the surface in thewake of the moving sea going vessel.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described in detail with reference to certainpreferred embodiments thereof and accompanying drawings where:

FIG. 1 illustrates a MagDrag apparatus in accordance with someembodiments of the present invention.

FIG. 2 illustrates the initial deployment of multiple apparatus in frontof an oncoming vessel.

FIG. 3 illustrates the initial impact of a vessel with a MagDragapparatus.

FIG. 4 illustrates how the MagDrag is pushed under the vessel hull.

FIG. 5 illustrates how the MagDrag plate is attached to the vessel hull.

FIG. 6 illustrates how the MagDrag attachment ring snap releases thebuoy after attaching to vessel hull.

DETAILED DESCRIPTION OF THE INVENTION

As described herein and specifically defined by the claims below, thepresent invention describes methods and apparatus for impeding thepassage of a ship underway. Generally drag device attaches to the hullof a ship via a ship attachment mechanism and slows the ship movementdue to a drag effect created by the attached drag device. The attachmentmechanism may include, for example, a powerful magnet that attaches viamagnetic force to the hull of a steel ship. The ship attachmentmechanism in turn is connected to a drag device that slows the movementof the ship while underway.

One example of a drag device includes a self inflating sea anchor. Aself inflating sea anchor may be deployed, for example via a similarmechanism as an airbag is deployed in a motor vehicle. Once attached tothe hull of a ship and deployed, the sea anchor creates increased dragon the ship hull and slows ship movement.

When a seagoing vessel passes over the MagDrag apparatus, the float willdrag along the side of or under the hull as the vessel moves by, withthe turbulence, the magnetic plate will eventually come close to andattach tightly to the hull and then the sea anchor will inflate due tothe forward motion of the seagoing vessel. Additional sea anchor openingtimers, quick setting pressure activating glues, GPS encodingtransmitters will enable a wide variety of non-lethal options forimplementing various shipping impairment strategies.

Referring now to FIG. 1, a MagDrag apparatus 0100 in accordance withsome embodiments of the invention is illustrated. The MagDrag apparatus0100 as illustrated utilizes a set of components that include: one ormore buoys 0103, a buoy relief valve (with optional beacon) 0101, a seaanchor 0104, such as, for example a self inflating bag. In someembodiments the self inflating bag may include an expanding gas. Inother embodiments, a self inflating bag may include a bag with a pumpfor pumping sea water into the bag and thereby inflate the bag with seawater. The mass of the sea water increases a drag effect on the ship.

In some embodiments, one or more sea anchor to buoy connector rods 0105are used to connect the sea anchor to an attachment device, such as, forexample, a magnetic plate (with optional wet curing glue surface) 0106and attachment ring 0107.

These components assembled as illustrated may be designed to float at alow level above the sea wave surface 0102 by adjusting a relief valve0101. The sea anchor bag 0104 is attached to the magnetic plank byplurality of steel rods 0105. The attachment ring 0106 allows the seaanchor bag 0104 and the magnetic plate 0106 to remain attached to thebuoy 0103 until the magnetic plate attaches magnetically to the hull ofan oncoming ship 0200.

The sequence of how a MagDrag apparatus 0100 is attached to a seagoingvessel hull 2101 is illustrated in FIGS. 2, 3, 4, 5, 6. The temporalsequence of the figures may be dependent upon several factors including,by way of example, ship speed and wave height. Generally the processfrom t=1 to t=4 may be anywhere from a few seconds to tens of seconds.

The MagDrag apparatus 0100 may be impacted by a hull of a sea goingvessel and then become fixedly attached via the magnetic attraction ofthe attachment mechanism to the steel hull of the ship.

Referring now to FIG. 2 an initial phase includes deployment of aplurality of MagDrags 0100 at t=0 when the MagDrags 0100 are depositedin the ocean, or other waterway in the path of an oncoming ship or otherseagoing vessel 0200.

Referring now to FIG. 3 an initial impact of apparatus 0100 with thehull 0201 of the oncoming vessel 0200 at t=1 allows for the apparatus0100 to engage the vessel 0200.

Referring now to FIG. 4, an illustration of the process at t=2 showswhen the bow of the vessel's hull 0201 traverses over the MagDrag 0100is pushed underneath the sea surface waves 0102. This turbulent movementeventually brings Magnetic Plate 106 closer to steel hull of the ship0201 and at some point in time, the magnetic attraction 0410 of themagnetic plate 0105 comes close enough to be attracted to and fixedlyself attach itself to the steel hull 0201.

Referring now to FIG. 5, at t=3 the magnetic plate 0106 connects to thesteel hull 0201, and the attachment ring 0107 of the buoy 103 is brokenby the stress induced by ships 0200 movement and water flow 0510 acrossthe MagDrag apparatus.

Referring now to FIG. 6, at t=4 the ships 0200 movement allows forattachment rods 0105 to spread open and inflate the sea anchor bag 0104as it is filled with oncoming water 0510. Because the buoy 103 isdetached with released attachment ring 0107 from the rest of the MagDrag apparatus components, its lighter weight causes the buoy 0103 tofloat 0610 to the surface. Once the buoy re-surfaces, the active beaconsignal mounted on the relief valve would be detectable.

In some embodiments, a glue may further facilitate attachment initiatedby magnetic attachment to the hull. In some embodiments, a permanentmagnet may be included in the attachment mechanism, in otherembodiments; an electromagnetic magnet may be used. In order to conserveenergy, some embodiments may include an activation circuit that powersthe electromagnet once the buoy is impacted by the ship. Theelectromagnetic effect will attach the attachment mechanism to the Hullof the ship and a glue will make the attachment more permanent.

The present invention may therefore include a relatively low cost forthe MagDrag device and allows for reasonable expense for deploying aplurality of devices, including in some embodiments, mass deployment ofMagDrags in a mouth of a harbor or other limited passage areas forships.

In some embodiments a variable length anchoring system as described inU.S. Pat. No. 7,179,145 may be used in conjunction with the basicMagDrag to allow for large scale deployment of more precisely positionedMagDrags in areas with large depth variations. MagDrag sea floor anchorsdo not need to be as precise as this 0145 contemplates for the apparatusto effectively accomplish its intended use.

In some embodiments, a sea floor anchor that digs into sand of fixed orvariable may be attached to the MagDrag to keep MagDrags in positionirrespective of currents and tides for long periods of time until suchtime as a vessel may impact it.

In some embodiments, a post impact timer built into the attachment ringwould for the opening of the attachment ring would enable wet curingglue on the magnetic plate to harden then the attachment ring releasesso that the closed and parallel aligned attachment rods would spreadopen and the sea anchors semi porous material such as canvas wouldself-inflate.

In some embodiments, the attachment ring could be any form of many typesof connectors that hold components together such as latches, pins,bands, clamps, etc.

In some embodiments, if the apparatus is not impacted by the targetedvessel, a delay timer and visual beacon or GPS encoding radio mounted ontop of the relief valve will enable the easy retrieval of MagDrags to beretrieved and not adversely encounter unintended vessels.

In some embodiments, the relief value can be configured to open based ona timer so that it can fill with water and sink the entire apparatus toavoid becoming a problem for shipping operations.

In some embodiments, hull penetrating mechanisms could be added to theapparatus to improve its ability to strongly adhere to the surface ofthe vessel. These include but are not limited to using tiny explosivecharges to penetrate the hull surface with nails to secure tighter thanthe magnet alone and enable the deployment of larger sized sea anchors.

The invention will enable small vessels to deploy large quantities of anapparatus that will slow down shipping operations from a harbor or portin a non-lethal manor as well as on the open seas to impede the forwardprogress of larger fishing vessels that are currently employed to catchmarine life.

In still another aspect, in some embodiments, a propulsion devicereplaces the buoy 0103 or is incorporated into the buoy 0103. Thepropulsion device 0103 essentially includes an unmanned water vehiclethat may be deployed using well known propulsion and control systems,such as for example a battery powered propeller and rudder controlledvia radio control. An operator may use the radio control to control thepropulsion device and rudder and steer the MagDrag device 0100 intocontact with the ship. More elaborate systems may use automateddetection systems included on the MagDrag 0100 that sense a ship inproximity and then propel the MagDrag into contact with the ship.

What is claimed is:
 1. Apparatus for attaching a sea anchor to a ship,the apparatus comprising: a buoyancy device for supporting a magneticplate and an inflatable sea anchor while placed in water; a magneticplate attached to the buoyancy device and supported by the buoyancydevice while the magnetic plate and the inflatable sea anchor are inwater; and a pump for pumping sea water into the inflatable sea anchorand thereby inflate the inflatable sea anchor with sea water such thatwhen a vessel comprising a steel hull impacts the buoy, the magneticplate becomes fixedly attached to the steel hull and the inflatable seaanchor provides drag on the steel hull.
 2. The apparatus of claim 1wherein the magnetic plate additionally comprises a layer of wet curingadhesive that is activated upon impact with the hull.
 3. The apparatusof claim 2 wherein the sea anchor remains closed until the wet curingadhesive has cured with a timer that activates a release of attachmentrods to enable the sea anchor to open.
 4. The apparatus of claim 1wherein the sea anchor is attached to the magnetic plate via one or moresteel connectors.
 5. The apparatus of claim 1 wherein the sea anchor isattached to the magnetic plate via one or more nylon cables.
 6. Theapparatus of claim 1 where the buoy has a tear away attachment postimpact that allows the buoy to float to a surface of water.
 7. Theapparatus of claim 1 where the buoy has a tear away attachment postimpact that causes the buoy to rip open and sink.
 8. The apparatus ofclaim 1 wherein the anchor of a predetermined length is attached to theapparatus.
 9. The apparatus of claim 1 wherein the buoy comprises aGlobal positioning Satellite device and radio position transmitter. 10.The apparatus of claim 1 wherein the sea anchor comprises one or moregas inflatable bag.
 11. The apparatus of claim 1 wherein the sea anchorcomprises a water inflatable bag and a pump for pumping water into thebag.
 12. A method for deploying the apparatus of claim 1, the methodcomprising the steps of: placing the apparatus for attaching a seaanchor to a ship in an spaced pattern in a water channel conducive toallow for impact of the apparatus against a hull of a traversing vessel;and pumping water into the inflatable sea anchor.
 13. The method ofclaim 12 additionally comprising the step of separating the buoy fromthe magnetic plate and floating the buoy to a surface of water in whichthe buoy is located.
 14. The method of claim 12 additionally comprisingthe step of separating the buoy from the magnetic plate and sinking thebuoy to the bottom when the magnetic plate attaches to the steel hullwhile moving.
 15. The method of claim 12 additionally comprising thestep of deflating the sea anchor by allowing water pumped into theinflatable sea anchor to exit the sea anchor.